Comparison of Chlorophyll and Photosynthesis Parameters of Floating and Attached Ulva prolifera  

作　　者：Apeng Lin Songdong Shen Guangce Wang Qianqian Yi Hongjin Qiao Jianfeng Niu Guanghua Pan 

机构地区：[1]Key Laboratory of Experimental Marine Biology, Institute of Oceanology, the Chinese Academy of Sciences, Qingdao 266071, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China [3]Department of Cell Biology, Medical College of Soochow University, Suzhou 215123, China [4]College of Marine Science and Engineering, Tianjin University of Science & Technology, Tianjin 300457, China

出　　处：《Journal of Integrative Plant Biology》2011年第1期25-34,共10页植物学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (30830015,30970302 and 40806063);the National Key Technologies R&D Program (2008BAC49B01);the Hi-Tech Research and Development Program of China (2006AA10A402 and 2007AA09Z406)

摘　　要：In mid-May 2008 a serious green tide caused mainly by floating Ulva prolifera （Mvller） J. Agardh （Chlorophyta, Ulvales） thalli struck the coastal area of Qingdao, China. To understand the present physiological conditions of the floating alga, in this work both laboratory and field investigations were conducted on the floating U. prolifera thalli in comparison with the attached U. prolifera thalli collected from the area. The floating thalli of three distinctively different colors and attached thalli at three different stages of sporangium formation process were characterized under a microscope, while their photosynthetic parameters were determined with chlorophyll fluorescence technology. On the other hand, the sporangium formation status of the floating U. prolifera thalli was surveyed both in the laboratory and in the field. Comparisons showed that both of the paired morphological characteristics and the paired physiological parameters of the floating and attached U. prolifera thalli were consistent. Furthermore, some spores were confirmed in the field and some motile particles were found within the floating thalli. These results suggest that the floating U. prolifera thalli with different colors could be at different stages of sporangium formation. However, our results also showed that the floating alga thalli have only a limited reproductive potential. This might limit the duration and the further geographic expansion of the green algal bloom.In mid-May 2008 a serious green tide caused mainly by floating Ulva prolifera （Mvller） J. Agardh （Chlorophyta, Ulvales） thalli struck the coastal area of Qingdao, China. To understand the present physiological conditions of the floating alga, in this work both laboratory and field investigations were conducted on the floating U. prolifera thalli in comparison with the attached U. prolifera thalli collected from the area. The floating thalli of three distinctively different colors and attached thalli at three different stages of sporangium formation process were characterized under a microscope, while their photosynthetic parameters were determined with chlorophyll fluorescence technology. On the other hand, the sporangium formation status of the floating U. prolifera thalli was surveyed both in the laboratory and in the field. Comparisons showed that both of the paired morphological characteristics and the paired physiological parameters of the floating and attached U. prolifera thalli were consistent. Furthermore, some spores were confirmed in the field and some motile particles were found within the floating thalli. These results suggest that the floating U. prolifera thalli with different colors could be at different stages of sporangium formation. However, our results also showed that the floating alga thalli have only a limited reproductive potential. This might limit the duration and the further geographic expansion of the green algal bloom.

分 类 号：TS202.3[轻工技术与工程—食品科学] Q945.11[轻工技术与工程—食品科学与工程]